Important:
Therapy
In mild penicillin allergy:
IV Ceftazidime 2g IV 8 hourly
plus
Gentamicin# IV (Hartford Regimen) as per guideline
Use calculator
In severe penicillin allergy
Meropenem 1g 8 hourly
(only if benefits of treatment outweigh the risk of severe allergy)
Notes:
In mild penicillin allergy, review the need for ongoing gentamicin on a daily basis according to severity.
#Consider aztreonam IV as an alternative to gentamicin for patients with CrCl ≤20ml/min
Aztreonam must be used with caution in patients with immediate hypersensitivity to penicillins or cephalosporins.
Aztreonam dosing:
CrCl 10 – 20ml/min - 2g loading dose then 1g 4 times daily
CrCl <10ml/min - 2g loading dose then 500mg 4 times daily
- Aztreonam does not provide the same antimicrobial spectrum cover as gentamicin.
- Aztreonam does not provide gram-positive cover (if staphylococcal infection suspected, seek advice from microbiology).